FAILED_FUTURE_CHECKED_EXCEPTION,
                    ExceptionWithManyConstructorsButOnlyOneThrowable.class));
    assertThat(exception).hasMessageThat().contains("mymessage");
    assertThat(exception.getAntecedent()).isEqualTo(CHECKED_EXCEPTION);
  }

  // Class unloading test:

  public static final class WillBeUnloadedException extends Exception {}